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Solid electrolyte material manufacturable by polymer processing methods

a polymer processing and electrolyte technology, applied in the field of solid polymer electrolyte materials, can solve the problems of high polymer chain mobility, inability to develop an electrolyte, curtailment of polymer electrolyte adoption, etc., to improve li-based batteries, improve thermal and environmental stability, and improve energy density

Active Publication Date: 2012-09-18
RGT UNIV OF CALIFORNIA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The material achieves high ionic conductivity (at least 1×10−5 Scm−1 at 90°C) and mechanical stability, enabling improved energy density, thermal stability, and safety in lithium-based batteries, with enhanced processability and reduced self-discharge rates.

Problems solved by technology

Despite their many advantages, the adoption of polymer electrolytes has been curbed by the inability to develop an electrolyte that exhibits both high ionic conductivity and good mechanical properties.
This difficulty arises because high ionic conductivity, according to standard mechanisms, calls for high polymer chain mobility.
The crystalline structure generally restricts chain mobility, reducing conductivity.
However, the increased conductivity comes at a cost in terms of deterioration of the material's mechanical properties.
In general, attempts to stiffen PEO, such as through addition of hard colloidal particles, increasing molecular weight, or cross-linking, have been found to also cause reduced ionic conductivity.
Similarly, attempts to increase the conductivity of PEO, such as through addition of low molecular weight plasticizers, have led deterioration of mechanical properties.

Method used

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  • Solid electrolyte material manufacturable by polymer processing methods
  • Solid electrolyte material manufacturable by polymer processing methods
  • Solid electrolyte material manufacturable by polymer processing methods

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Embodiment Construction

[0040]Embodiments of the present invention relate generally to electrolyte materials. More particularly, the embodiments relate to solid polymer electrolyte materials that are ionically conductive, mechanically robust, and manufacturable by conventional polymer processing methods. Merely by way of illustration, an exemplary polymer electrolyte material has an elastic modulus in excess of 1×106 Pa at 25 degrees C. and is characterized by an ionic conductivity of at least 1×10−5 Scm−1 at 90 degrees C. Many uses are contemplated for the solid polymer electrolyte materials. By way of example, the present invention can be applied to improve Li-based batteries by means of enabling higher energy density, better thermal and environmental stability, lower rates of self-discharge, enhanced safety, lower manufacturing costs, and novel form factors.

[0041]The current invention includes solid polymeric electrolyte materials. According to an embodiment, the material includes unique molecular archi...

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Abstract

The present invention relates generally to electrolyte materials. According to an embodiment, the present invention provides for a solid polymer electrolyte material that is ionically conductive, mechanically robust, and can be formed into desirable shapes using conventional polymer processing methods. An exemplary polymer electrolyte material has an elastic modulus in excess of 1×106 Pa at 90 degrees C. and is characterized by an ionic conductivity of at least 1×10−5 Scm-1 at 90 degrees C. An exemplary material can be characterized by a two domain or three domain material system. An exemplary material can include material components made of diblock polymers or triblock polymers. Many uses are contemplated for the solid polymer electrolyte materials. For example, the present invention can be applied to improve Li-based batteries by means of enabling higher energy density, better thermal and environmental stability, lower rates of self-discharge, enhanced safety, lower manufacturing costs, and novel form factors.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application claims priority to U.S. Provisional Patent Application 60 / 988,085, filed Nov. 14, 2007, which is incorporated by reference herein. This application is a continuation-in-part of U.S. patent application Ser. No. 12 / 225,934, filed Jun. 19, 2009, which is a national phase application of PCT Application Number PCT / US2007 / 008435, filed Apr. 3, 2007, which claims priority to U.S. Provisional Patent Application No. 60 / 744,243, filed Apr. 4, 2006 and U.S. Provisional Patent Application No. 60 / 820,331, filed Jul. 25, 2006, all of which are incorporated by reference herein.STATEMENT OF GOVERNMENT SUPPORT[0002]The invention described and claimed herein was made in part utilizing funds supplied by the U.S. Department of Energy under Contract No. DE-AC02-05CH11231. The Government has certain rights in this invention.BACKGROUND OF THE INVENTION[0003]The present invention relates generally to electrolyte materials. More particularly, the...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): H01B1/12B32B7/04H01M50/443H01M50/497
CPCH01B1/122H01M2/16H01M2/1686H01M10/0565H01M6/181H01M2300/0088H01M10/052H01M2300/0082Y10T428/31663Y10T428/31576Y10T428/31573Y10T428/31587Y10T428/31511Y10T428/31515Y10T428/31536Y02E60/10H01M50/443H01M50/497
Inventor SINGH, MOHITGUR, ILANEITOUNI, HANY BASAMBALSARA, NITASH PERVEZ
Owner RGT UNIV OF CALIFORNIA
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